Home / 138,756.12-191,463-81,373.74

Finding the Fourth Proportional to 138,756.12, 191,463 and 81,373.74

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Solution

The fourth proportional to 138,756.12, 191,463 and 81,373.74 is: 112,283.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,756.12 : 191,463 = 81,373.74 : x
  2. Step 2: Convert to fraction form
    138,756.12/191,463 = 81,373.74/x
  3. Step 3: Cross multiply
    138,756.12x = 191,463 × 81,373.74
  4. Step 4: Simplify right side
    138,756.12x = 15,580,060,381.62
  5. Step 5: Solve for x
    x = 15,580,060,381.62/138,756.12
  6. Step 6: Final answer
    x = 112,283.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.